asper

/as-per/US // ˈæs pər //UK // (ˈæspə) //

阿斯佩尔,阿斯伯格,阿斯旺,阿斯普尔

Definitions

n.名词 noun

1
- : a former silver coin of Turkey and Egypt: later a money of account equal to 1/120 of a piaster.

The juvenal pattern of some individuals of T. spinifer asper differs according to sex.
Trionyx ferox in the northern part of its range is sympatric with T. spinifer asper.
Because the description of the pattern of ferox resembled that of asper, the validity of asper was not agreed upon by all workers.
There seems to be little adumbration of the dark marginal lines of asper in populations from the lower Mississippi River drainage.
Large skulls of ferox and some asper (those in Atlantic Coast drainages) have expanded crushing surfaces on the jaws.